1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276fb27417c130fe709e5ebe4e971c82068deda513fe6e4af74a15c93594fdee. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f042e2b-9961-4925-83fb-736437a19903.json and https://artists.proofprofile.net/proofs/artist/4f042e2b-9961-4925-83fb-736437a19903.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b6a496dd50baf0a13ed563a42fe98c8b3ca6ff0e6dc870d5e85f0abbd5fb09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0019901.
Gluck: Alceste, Wq. 44 (Sung in French) [Live Recordings 1981]
Vaughan Williams: Serenade to Music, Flos Campi, 5 Mystical Songs, Fantasia on Christmas Carols
5 Mystical Songs: No. 2, I Got Me Flowers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d8382156d6ab8371c7c32e608e6bcff38a4be0d5dbe676785c2070fff644c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9042003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3709ad43a738b6adf7cad60e665d4081a60244e0e32c727bdf5fd4c779e611f3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9042001.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd7ab656b75e5d916f1f0e6aca57f97d59e9ca097f0cd0d3392bbc92d3c806e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9042002.
5 Mystical Songs: No. 3, Love Bade Me Welcome
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15787232a94366db873cc41e6e5b8a9b485585d81e04913d5cb17616475f30ff. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9042004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c5ce059da4d6dc4a7b76313825c746cfe6d77679318bea44b0eb63f34d7e8e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9042005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa888476203326b458da2b41adc57985683107eddd4a9eed242e186a1834ba64b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9042006.
Bruckner: Te Deum; Mass No. 1 in D Minor
Rutter: Gloria - Bernstein: Chichester Psalms - Poulenc: Quatre petites prières
Gloria: Gloria in excelsis deo. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39f5539e12148abf31175dbc8d4caf5d98b1b3e80f6a1c3eadfd61c903ebbd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330900747.
Gloria: Domine deus, rex coelestis. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9f25b792fbbd5a5784ce2b8d33e98c61266c52a3a04d8b0bcdc1b50a44f215. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330900748.
Requiem, Op. 48 (1893 Version): I. Introitus. Requiem aeternam – Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7928527455718d6d907c83f02010116a1b7a7d622673b68aab956dcdf68ce18c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8929201.
Requiem, Op. 48 (1893 Version): IV. Pie Jesu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c902ffb8a5a6c6257b1b15cb3bab0fdf7d77d3e5fa8ac31f51f10fa4fa62aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8929204.
Requiem, Op. 48 (1893 Version): VII. In paradisum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515190349a4a4709a5d399030c48bb6f2b8581e2446f9de5a12639c2e74a82b6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8929207.
Tchaikovsky: Liturgy of St John Chrysostom, Op. 41; 9 Sacred Choruses
Beethoven: Early Cantatas: Cantata for Joseph II; Cantata for Leopold II etc.
Finzi: Dies natalis & Intimations of Immortality
Beethoven: Mass in C Major; Ah! perfido; Tremate, Op. 116
Rachmaninoff: The Divine Liturgy of St John Chrysostom
Vaughan Williams: Dona nobis pacem & Other Works
Villa-Lobos: Missa São Sebastião & Other Sacred Music
Bruckner: Mass No. 3 in F Minor & Psalm 150
Vaughan Williams: The Shepherds of the Delectable Mountains & Other Works
Hugh the Drover, Act I: Pt. 1. Buy, Buy, Buy! Who'll Buy?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0b878fe3a762c8e81b944d2d77470106cb30d2ecbf2ae81c76bf196985935. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490101.
Hugh the Drover, Act II: Pt. 2. Gaily I Go to Die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f0e0c2ae6208f8e71cf9f15646d36cde95ecf607288e5248419c578354cd3a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490202.
Hugh the Drover, Act I: Pt. 7. Show Me a Richer Man in All This Town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774827e0afad109d1741d65ed145de29d4bfae817da38a3bd916902588fe7a4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490107.
Hugh the Drover, Act II: Pt. 11. Halloo! Halloo! Mary and Hugh!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0b5b1491bbc3599c27259b4a72f4ca083add1491f773fa0ed1ca72b0d7f9d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490211.
Hugh the Drover, Act I: Pt. 18. Who'll Fight? A Fight! Who's for a Fight?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb34197ce27addb8d22c91ec0e4e2ae994e160ce7ea077c16bc3ca23c1ba40. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490118.
Hugh the Drover, Act I: Pt. 21. Alone and Friendless, on This Foreign Ground
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9657942388a34bff9c82802abc47d164a8f10af248113785d6369cbeb51730. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490121.
Hugh the Drover, Act I: Pt. 22. Are You Ready? Go!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b9578142e18d373ee82350585f570fd40b311ad486824ed76ccbafe06c4e53. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490122.
Hugh the Drover, Act I: Pt. 24. Oh, the Devil and Bonyparty
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82919db7721ab58af51984f27f5d864267d9d339078e643a8eeafb44035d1c5e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490124.
Hugh the Drover, Act II: Pt. 1. Past Four o'Clock, and Dawn Is Coming
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf7a2f174ca534bb94976e5e1b02fc20b0d0db6dab7b9caa9a21fd37f972541. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490201.
Hugh the Drover, Act I: Pt. 2. Who'll Buy My Sweet Primroses?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17935e8e3870c6bb3141731d4cef1bb99e66507d17c84f51e1c15cdf511305c0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490102.
Hugh the Drover, Act I: Pt. 3. Cold Blows the Wind on Cotsall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5897ead55bb74450bce2b9cf2e80b7dafde29f3ed4d2f124c5d61c2fa4428. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490103.
Hugh the Drover, Act I: Pt. 4. Ballads! Buy My Ballads, Pretty Ballads!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fbb86b9858b8f88d491503524e9242829bcbafea599e440578e91c6c3bda27. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490104.
Hugh the Drover, Act I: Pt. 5. As I Was A-Walking One Morning in Spring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96f190c21f9401a17f15daeac17bee672a74218185b7845b7b2b81d6563fad. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490105.
Hugh the Drover, Act II: Pt. 6. O I've Been Rambling All This Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deafe8c4227b23f38ab4fc4c79e8f85a7534bbcdcb2688cf3cf0114a9dba5e3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490206.
Hugh the Drover, Act II: Pt. 7. Here, Queen Uncrowned
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa184279a65bf3849ac524becc2cf7e0c8f7894244360198baaede647659cdc46. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490207.
Hugh the Drover, Act I: Pt. 23. Hugh the Drover!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf676963dbb926eb727d3638e85901ae0d6712c9c2f05074c22f09515cebf665b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9490123.
Vaughan Williams: The Pilgrim's Progress
Britten: Billy Budd, Op. 50, Act 1, Scene 1: "Christ! The Poor Chap" (Billy, Dansker, Red Whiskers, Donald)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba131b599fe96f791100bc864494f23c15e0636cb54b578388343a546c5cd4aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0801590.
Britten: Billy Budd, Op. 50, Act 1, Scene 1: "Starry Vere We Call Him" (Donald, Billy, Sailors, Red Whiskers, Dansker, Bosun)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd03470198a4d93300ca3a2b7fb3675d2080da0a1cb8670b1e2cf446ad4c03a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0801592.
Britten: Billy Budd, Op. 50, Act 1, Scene 3: "Blow Her Away, Blow Her to Hilo" (Red Whiskers, Sailors, Billy, Donald, Dansker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85db3c88e233df331815ba4621f0a817d490e77f86813acd25991fe6f3c9c4. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0801597.